NOT FOR LANDING Experiment with allocating SVGImageForContainer on demand

Source/core/style/StyleFetchedImageSet.h

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 23 matching lines @@
 namespace blink {
 
 class ImageResource;
 class CSSImageSetValue;
 
 // This class keeps one cached image and has access to a set of alternatives.
 
 class StyleFetchedImageSet final : public StyleImage, private ImageResourceClient {
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(StyleFetchedImageSet);
 public:
-    static PassRefPtrWillBeRawPtr<StyleFetchedImageSet> create(ImageResource* image, float imageScaleFactor, CSSImageSetValue* value)
+    static PassRefPtrWillBeRawPtr<StyleFetchedImageSet> create(ImageResource* image, float imageScaleFactor, CSSImageSetValue* value, const KURL& urlWithFragment)
     {
-        return adoptRefWillBeNoop(new StyleFetchedImageSet(image, imageScaleFactor, value));
+        return adoptRefWillBeNoop(new StyleFetchedImageSet(image, imageScaleFactor, value, urlWithFragment));
     }
     ~StyleFetchedImageSet() override;
 
     PassRefPtrWillBeRawPtr<CSSValue> cssValue() const override;
 
     // FIXME: This is used by StyleImage for equals comparison, but this implementation
     // only looks at the image from the set that we have loaded. I'm not sure if that is
     // meaningful enough or not.
     WrappedImagePtr data() const override { return m_bestFitImage.get(); }
 
 #if !ENABLE(OILPAN)
     void clearImageSetValue() { m_imageSetValue = nullptr; }
 #endif
 
     bool canRender(const LayoutObject&, float multiplier) const override;
     bool isLoaded() const override;
     bool errorOccurred() const override;
     LayoutSize imageSize(const LayoutObject*, float multiplier) const override;
     bool imageHasRelativeWidth() const override;
     bool imageHasRelativeHeight() const override;
     void computeIntrinsicDimensions(const LayoutObject*, Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) override;
     bool usesImageContainerSize() const override;
-    void setContainerSizeForLayoutObject(const LayoutObject*, const IntSize&, float) override;
     void addClient(LayoutObject*) override;
     void removeClient(LayoutObject*) override;
     PassRefPtr<Image> image(LayoutObject*, const IntSize&) const override;
     float imageScaleFactor() const override { return m_imageScaleFactor; }
     bool knownToBeOpaque(const LayoutObject*) const override;
     ImageResource* cachedImage() const override { return m_bestFitImage.get(); }
+    KURL url() const override { return m_urlWithFragment; }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    StyleFetchedImageSet(ImageResource*, float imageScaleFactor, CSSImageSetValue*);
+    StyleFetchedImageSet(ImageResource*, float imageScaleFactor, CSSImageSetValue*, const KURL&);
 
     ResourcePtr<ImageResource> m_bestFitImage;
     float m_imageScaleFactor;
 
     RawPtrWillBeMember<CSSImageSetValue> m_imageSetValue; // Not retained; it owns us.
+    KURL m_urlWithFragment;
 };
 
 DEFINE_STYLE_IMAGE_TYPE_CASTS(StyleFetchedImageSet, isImageResourceSet());
 
 } // namespace blink
 
 #endif // StyleFetchedImageSet_h